/*****************************************************************************
NAME:			_tt (tree toggle)
PARAMETERS:		o - DOM element (<a> tag contained by <li> tag and followed by an <img> tag)
DESCRIPTION:	toggles opened/closed state for a banch (changes class for containing <li> tag
NOTE:			short cryptic name "_tt" used to decrease the size of the HTML
				in a tree
*****************************************************************************/
function _tt(o)
	{
    try
		{
		if ('rhto'==o.parentNode.className)
			{		
			o.parentNode.className='rhtc';
			o.firstChild.src='WebResource.axd?d=TKeeeUiNcWqB6RlpWq8WL0tC_VhIGARP-V76j0JHPdlG_z_KvNGBdPysnt_wqi8ZoF9vSmxWZUfA8CLfYG24YA2&t=633547237822354489';
			o.firstChild.alt='expand';
			}
		else
			{
			o.parentNode.className='rhto';
			o.firstChild.src='WebResource.axd?d=TKeeeUiNcWqB6RlpWq8WL0tC_VhIGARP-V76j0JHPdlG_z_KvNGBdPysnt_wqi8ZjNX2Z4gv5lmf4CaN5K1UDQ2&t=633547237822354489';
			o.firstChild.alt='collapse';
			}
		}
	catch(err)
		{
		}
    }